@FelixLovesPete Yeah, these are the things you can do to see if they help out with that console.
Xbox Series X
- Quit all running Apps (For Series X|S consoles)
- Remove any connected device, or additional USBs from the console then restart the Xbox
- Check for updates
- Try the steps in our Connection and Advance Connection Guides
- Open you're Xbox NAT Type
- Change DNS settings (You can use the public Google DNS primary: 8.8.8.8, secondary: 8.8.4.4)
Persistent Storage
- Go to settings > Select Device & Connections > Then Blue-Ray
- Select Persistent Storage > Clear Persistent Storage
Alternate Mac:
- Go to settings > Select General > Then Network settings
- Go to advanced settings > Alternate Mac address > Select clear
- Select restart
Factory reset - there are a couple of options here. Reset to factory or reset and keep all games
Delete the Gamertag and the game from the console. Log back into the Gamertag and redownload the game. This syncs up everything correctly.